We can be sure the particles in the rings of Neptune are very small because

The four stages of planetary development are shown above. Which is the last one?

Briefly (but completely!) summarize how the greenhouse effect functions in Earth’s atmosphere.

On its icy surface, Uranus’s satellite Ariel has smooth valleys with few craters. Other areas are rough with many craters. Based on this, it can be concluded that

Tidal heating may cause the geological activity you see in the above image of the surface of Europa.

The graph below plots the escape velocity of each planet along the vertical axis and its surface temperature along the horizontal. The lines plotted in the figure are the average speeds of gas particles as a function of temperature for various gases. Which of the planets or satellite plotted in this diagram has the greatest escape velocity? ​ ​

SUSTANTIVOS QUE REFIEREN A PERSONAS – MASCULINAS y FEMENINAS. Para cada persona, ponga el artículo y la forma que corresponden al otro género.  For each person listed, write the opposite gender form of the same word: el pasajero /  la pasajera     masculino femenino   masculino femenino el chico             [lachica]   [elhombre] la mujer [elconductor] la conductora   el joven              [lajoven] el estudiante     [laestudiante]   [elprofesor] la profesora

SALUDOS Y DESPEDIDAS: Frank is on his way to class while studying abroad, and is looking for the office of his new professor. Fill in the blanks to complete their formal dialogue in a logical manner.  FRANK:            Buenos [dias]. Busco (I am looking for) al profesor Pérez. PROFESOR:     Yo soy el profesor Pérez. ¿Cómo se [llama] usted? FRANK:            Yo me [llamo] Frank. PROFESOR:     Mucho [gusto] . FRANK:            El gusto es mío. Estoy en su clase hoy. ¿Cómo [esta] usted? PROFESOR:     Muy bien, gracias. ¿De dónde [es] usted? FRANK:            Yo [soy] de los Estados Unidos, de California. PROFESOR:     Bienvenido a México. FRANK:            Gracias. When Frank leaves the professor’s office, he sees his friend Alfredo as he hurries to class. Fill in the blanks to complete their informal dialogue. FRANK:            ¡Hola, Alfredo! ALFREDO:        ¡Hola, Frank! ¿Qué [tal]? FRANK:            Regular. ¿Y [tu]? ALFREDO:        Bien, gracias. Hasta [luego].

The four stages of planetary development are shown above. Which is the first one?

Compared to the magnetosphere of Earth, the magnetosphere of Saturn is shown in the picture above.